I told you guys about A Band Called Death and now I can heartily recommend it! It's not just about a band but it's also about brothers, family, grief, and having a dream. I laughed a bunch and (embarrassingly) cried just as much. It's a really great story.
I asked the director what the band considers themselves genrewise and he said "really fast rock and roll" but when one of them was a radio DJ when punk was really coming out they noted that they sounded kind of like Death.